1xco

Crystal Structure of a Phosphotransacetylase from Bacillus subtilis in complex with acetylphosphate

spinqualitylabelsall models 1xco, resolution 2.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1xco is a 6 chain structure with sequence from Bacillus subtilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.85Å Ligands: SO4, UVW Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT, TOPSAN Function PTAS_BACSU Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Phosphotransacetylase (Pta) [EC 2.3.1.8] plays a major role in acetate metabolism by catalyzing the reversible transfer of the acetyl group between coenzyme A (CoA) and orthophosphate: CH(3)COSCoA+HPO(4)(2-)<-->CH(3)COOPO(3)(2-) +CoASH. In this study, we report the crystal structures of Pta from Bacillus subtilis at 2.75 A resolution and its complex with acetyl phosphate, one of its substrates, at 2.85 A resolution. In addition, the Pta activity of the enzyme has been assayed. The enzyme folds into an alpha/beta architecture with two domains separated by a prominent cleft, very similar to two other known Pta structures. The enzyme-acetyl phosphate complex structure reveals a few potential substrate binding sites. Two of them are located in the middle of the interdomain cleft: each one is surrounded by a region of strictly and highly conserved residues. High structural similarities are found with 4-hydroxythreonine-4-phosphate dehydrogenase (PdxA), and isocitrate and isopropylmalate dehydrogenases, all of which utilize NADP+ as their cofactor, which binds in the interdomain cleft. Their substrate binding sites are close to the acetyl phosphate binding sites of Pta in the cleft as well. These results suggest that the CoA is likely to bind to the interdomain cleft of Pta in a similar way as NADP+ binds to the other three enzymes. Crystal structures of a phosphotransacetylase from Bacillus subtilis and its complex with acetyl phosphate.,Xu QS, Jancarik J, Lou Y, Kuznetsova K, Yakunin AF, Yokota H, Adams P, Kim R, Kim SH J Struct Funct Genomics. 2005 Dec;6(4):269-79. Epub 2005 Nov 9. PMID:16283428 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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